Body Fat Calculator Using Height And Weight

Body Fat Percentage Formula:

\[ \text{Body Fat %} = (1.20 \times \text{BMI}) + (0.23 \times \text{age}) - (10.8 \times \text{sex}) - 5.4 \]

Height:

Weight:

Age:

years

Gender:

Body Fat Percentage:

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1. What is Body Fat Percentage?

Body fat percentage is the total mass of fat divided by total body mass, multiplied by 100. It provides a more accurate measure of fitness than weight or BMI alone, as it distinguishes between fat mass and lean body mass.

2. How Does the Calculator Work?

The calculator uses the following formula:

\[ \text{Body Fat %} = (1.20 \times \text{BMI}) + (0.23 \times \text{age}) - (10.8 \times \text{sex}) - 5.4 \]

Where:

\( \text{BMI} \) — Body Mass Index (weight in kg divided by height in meters squared)
\( \text{age} \) — Age in years
\( \text{sex} \) — 1 for female, 0 for male

Explanation: This formula estimates body fat percentage based on BMI, age, and gender. It provides a quick estimation without specialized equipment.

3. Importance of Body Fat Measurement

Details: Monitoring body fat percentage is important for assessing health risks, tracking fitness progress, and determining appropriate weight management strategies. High body fat percentage is associated with increased risk of various health conditions.

4. Using the Calculator

Tips: Enter height in centimeters, weight in kilograms, age in years, and select your gender. All values must be valid (height > 0, weight > 0, age between 1-120).

5. Frequently Asked Questions (FAQ)

Q1: How accurate is this calculation method?
A: This formula provides a reasonable estimate but may not be as accurate as specialized methods like DEXA scans or hydrostatic weighing. It's best used for tracking trends over time.

Q2: What are healthy body fat percentages?
A: For men: 6-24% is generally healthy; For women: 16-30% is generally healthy. These ranges vary by age and fitness level.

Q3: Why does the formula include age?
A: Body composition changes with age, typically increasing fat mass and decreasing muscle mass, even when weight remains stable.

Q4: Can athletes use this calculator?
A: Highly muscular individuals may get inaccurate results as BMI doesn't distinguish between muscle and fat mass.

Q5: How often should I measure my body fat?
A: For tracking purposes, monthly measurements are sufficient as daily fluctuations are normal and body fat changes slowly.